My #Scifi novel #TheShipFinder is FREE as a Kindle book until June 2, 2015. It’s now #9 in Kindle eBooks>SciFi & Fantasy>SciFi>Colonization (as of May 30). Check out
http://www.amazon.com/dp/B00IIIBW1M
The young adult version is also FREE until June 2, 2015. See:
http://www.amazon.com/dp/B00N42RZ9U
johnbluck 